*{
    margin: 0;
    padding: 0;
}
div{
    color: #fff;
    height: 200px;
}
.center{
    float: left;
    width: 100%;
}
.center .content{
    margin:0 210px 0 110px;
    background-color: orange;
}
.left{
    float: left;
    width: 100px;
    margin-left: -100%;
    background-color: green;
}
.right{
    float: left;
    margin-left: -200px;
    width: 200px;
    background-color: green;
}